Location – Arni (Another)
HowToGet:
This is an easy @Rainbow Shell. When you first be able to use the "Astral Amulet" to cross Dimensions, get back to Home World and go to Arni. When you talk to the girl that works in the bar (you can call it that :), and tell her about her other self in Another World (I think you must speak to her other self in Another first), she'll laugh and say you're joking, but she will give you the Key Item "Book of Poems" anyway, and tell you to show it to her other self in Another World. Well, do that, and the girl from Another will give you back the "Book of Poems" but she'll also give you a @Rainbow Shell for your troubles.

Location – Termina (Another)
HowToGet:
Now, this is the Weird one, as I said. After the event at Viper Manor with Kid being poisoned, go back to Termina and talk to the "Viper Churros" salesman. He'll tell you that his business is very bad and ask you for some suggestion. He says it cost 100G, and you get 3 answers to give him, which is (short answer, the long one I forgotten).
1. It's too cheap.
2. It's too expensive.
3. It's just right

Now, answer him that it's too expensive, and he'll ask you to suggest a price for it, put it at somewhere around 60G, you put less, he'll tell you something funny, just try it, LoL. But, as I said, put it round 60G and he'll agree with it. You can watch an event now if you go to Skelly's grandmother's house and walk near the window, you'll see now that after he lowers the price, his business is very good. You can talk to him anytime and he'll give you some Viper Churros to eat for free. No @Rainbow Shell for now, still longer explanation to go.

Now, after the Lynx incident, where Porre soldiers took over Termina and after you get your body back, go to him again and he'll offer you some leftovers which you will automatically eat. When you eat it, it will say something like "You bit something hard inside", then you will check it and you'll get a @Rainbow Shell. Took long enough :)

Location – S.S. Zelbess (Another)
HowToGet:
Another easy @Rainbow Shell, you can get it anytime as Lynx. Just play the roulette game and get the Rank 1 prize, it's a @Rainbow Shell. You can play it again and get Rank 1, but unfortunately, they're all out of @Rainbow Shells and can only offer you @Denadorites :(
To attain Rank 1 easily, use this cheat. While the pointer is spinning, pause the game. If you see the pointer between S and W, press the X button, while holding it, unpause the game, the Pointer will stop at N every time and JACKPOT, double your points. Repeat it every round and you'll gain points fast. You'll need around 10,000 to get a Rank 1 Prize.
Message: I got this cheat from GameSages. Credits goes to whoever submit that cheat, which I didn't have time to check. If whoever reading this is the one that submit the cheat, special thanks to you for the easy @Rainbow Shell.

Location – Earth Dragon Isle. (Home)
HowToGet:
When you arrive at the Earth Dragon Isle., you will see that the Explorer team are unable to get in any further as they is no way in. The sand boil shoot them back up whenever they try to jump down and there is only a Quick Sand in the center. Well, go to the Quick Sand and you will fall down into a Cavern, you will find a creature blocking the way. Just go up again through the sand boil and talk to the Captain, he'll thank you for finding the way to get in and say they will take care of the creature blocking the way.
This part I don't remember that well. He will either give you the @Rainbow Shell now, either that or when you come later when you need to do the Dragon Gods Task, talk to him and he'll say he had taken care of the creature blocking the way, and thank you again and give you a @Rainbow Shell.

Location – Arni (Another)
HowToGet:
Another easy one. You will notice that when you check the cart of the Element saleswoman in Arni (Another), it will say that "????? Found a @Rainbow Shell", but the woman says it's not for sale and you will just put it back.
Well, after you became Lynx and the Astral Amulet won't work meaning you are trapped in Home World for awhile. That is until you go to the Dead Sea and do the task there. Well, after the portal reopened, go to Another World and visit Arni, you will see that the village is deserted as all the Villagers had gathered in the Chief's House. Well, as the saleswoman isn't there anymore, you can check the Cart and get the @Rainbow Shell and she won't be there to stop you from taking it :)

Location - Viper Manor (Another)
HowToGet:
In the armory, take the Décor Shield from the wall, put in on the Statue that doesn't have a Shield, fight them as they attack you (easy win). After that, check the pillar (left) and press the switch, then push the snake statue into square space/box that invites you to push the statue into it (It's so obvious you can push the statue there :). A secret wall will open and you can go in. There is 2 chest in the Room, one contains the "Viper Venom", Viper's sword, and the other one, our main goal, the @Rainbow Shell.

Location – Fort Dragonia (Home)
HowToGet:
Steal it from Dark Serge while fighting him!

Location – Burning Orphanage (Another)
HowToGet:
It's the part when you go back to the past to the Burning Orphanage in Kid's dream/nightmare. After defeating FATE, Kid will faint (yet again) and be in a coma. Go to Hermit's Hideaout and see her there. You must have either the Mastermune or Chrono Cross(?). In my case (Mastermune), the Mastermune will transport you and 2 party members to the Burning Orphanage with their (Masa, Mune & maybe Doreen too) powers and the help of the not completed Time Egg.
There are 2 @Rainbow Shells to get, one on the room you arrive in, check the side of the grandfather type clock after killing the LavaBoy, a kid will come out and thank you and give you a @Rainbow Shell.
The other @Rainbow Shell is also given to you by a kid after you saved him. I quite forgot which kid, either the one in the room up the right stairs or the one in the corridor outside the room. Just talk to the kids after saving them, one of them will give you a @Rainbow Shell while the others give you Nostrum normally.
(?) - Not sure, I used Mastermune, but I heard you can do it too with the Chrono Cross, but if you have both, like me, you'll use the Mastermune automatically. That's why I'm not sure if you can do it too with the Chrono Cross.

Location – Viper Manor (Another)
HowToGet:
When Kid reawaken after the Burning Orphanage subquest, Radius will tell you that Luccia wants to see Kid at her lab in Viper Manor. Well, bring Kid along with you and go and see what Luccia wants at her lab (Viper Manor, duh). She'll give Kid a letter from Lucca. Once Kid open it, something shiny will drop out of it onto the table, but she won't take it yet. She'll read the letter, then tell you to leave her alone for a while. Once you have left (which is automatically), Kid will say something to herself and pick up the Shiny object that dropped on the table which turns out to be a @Rainbow Shell. Yeah!

Location – Chronopolis (Another)
HowToGet:
It's in a chest somewhere in Chronopolis (3rd floor, I think), hard to explain which, just explore every room and open all the chest you see, one of them contains a @Rainbow Shell.

(note from editor: I won't meddle with the original author's text, but it's definitely on the 3rd floor)

Location – Terra Tower (Another)
HowToGet:
There's around 2-3 @Rainbow Shells located in chests scattered across Terra Tower. I have no definite location of which chest contains a @Rainbow Shell, but fear not, it is very easy to find!

(note from editor: come on man)

Location – Chronopolis (Another)
HowToGet:
Steal it from PolisPolice while fighting it in Chronopolis. It's an automatic boss so you can't miss fighting him :) Many thanks to a few person who confirms this rare steal!

Location – Earth Dragon Isle (Another)
HowToGet:
Another steal! This time steal it from the Cronosphinx while fighting him.

Location – Water Dragon Isle. (Another)
HowToGet:
This island is all dry up and all you can find here are explorers. Visit them before you become Lynx and one of them will give you one of Skelly's bone which he said is giving him nightmares and stuff. After the Lynx incident (Serge-Lynx-Serge back), and after you have finished collecting all of Skelly's bones and reassembled him, go back to Water Dragon Island and talk to the explorer. He'll say his nightmare has gone now and give you a @Rainbow Shell as a sign of apology or a sign of thanks I'm not sure.
By the way, you MAY get the @Rainbow Shell from the explorer even if you haven't completed Skelly yet, but I'm not sure about this since when I talked to him and he gave me the @Rainbow Shell, I have already finished assembling Skelly.

Location – El Nido Triangle (Another)
HowToGet:
There's 2 chest containing @Rainbow Shells on this area. You just can't miss it.

To start forging, you need 3 things.

• Zappa – Recruit him in Termina (Home)
  
• @Rainbow Shell – That's what this Guide is all about. You need at least 1
  
• Master Hammer – Buy it for 10,000 G at Marbule (Home) after restoring it, and also after killing the Black Dragon. If you didn't kill the Black Dragon, or/and didn't restore Marbule (Home), you can never get the Master Hammer hence never get to forge Prism/Spectral Weapons & Armors. You can buy it in the place where you fought the Black Dragon.

Once you got all those, equip the Master Hammer to Zappa and with Zappa in your team, go to Termina (Another) and talk to the Zappa there. Zappa(s) will be surprised to see a @Rainbow Shell and they will both start to forge a Rainbow Axe. Once it is done, your Zappa will now know how to forge a Rainbow Weapon and you can forge it anytime you want using Smith Spirit or at Zappa's shop (Another). Unfortunately you won't get the Rainbow Axe they forged but you will not lose any @Rainbow Shells, as they forge the axe using a @Rainbow Shell of their own, where they found it I don't know, heh.

Remember, you'll need the 7 Main Ingredient to forge Prism/Spectral Weapons & Armors. Luckily only one of each.

Which is worth it and which is not, that is the question. Although Spectral Swallow has higher damage rating than Mastermune, Mastermune does more critical strikes therefore in term, more damage. BUT you can forge a Spectral Swallow so that when you start a New Game+, you'll start with Serge's 2nd most powerful weapon.

And Einlanzer, definitely more damage than Spectral Sword, but if you forge Spectral Sword, you can start with Glenn's 2nd most powerful weapon when you play New Game+.

The Prism Mails are definitely worth it, as they add quite an amount of extra defense compared to Stone Mails. But according to my opinion, the Prism Helmets are not a good choice. Prism Helmets only add plus 1 Def and 1 M. Def compared to Stone Helmets, and it takes one @Rainbow Shell to forge it when you can use that @Rainbow Shell to forge other things that is more worth it. Only do it if you had the extra @Rainbow Shells (which is unlikely, even in New Game+, unless you concentrate on just a 3-5 chars).

Full credits goes to By JMak2000